Dexkof Plus (Dextromethorphan + Phenylephrine + Triprolidine) needs some care when it is taken with Atropine Sulphate. The leaflet lists atropine by name as an example of an antispasmodic, which is a medicine used to ease cramps and spasms. It says to be cautious when using such medicines together with this cough and cold medicine. It doesn't say exactly what can happen, so don't take the two together on your own. Ask your doctor or pharmacist first, and tell them about every medicine you are using.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.